Have the same problem with my 260 rem.
By tapping the filled case to settle the powder, the once compressed charge now does not interfere with bullet seating,
and the concentricity issue is solved. At least that's what worked in my case. [img]/ubbthreads/images/graemlins/laugh.gif[/img]

The tapping of the case suggestion reminds me that there is a very old trick that I have heard of which is placing something like an electric razor or small engraving tool against the tray once the powder is in the case and letting the vibrations settle the powder to maximum density before bullet seating.

I would not let this go for more than a few minutes because most of the settling is going to occur fairly quickly and the rest of the time is just powder rubbing on powder and pretty soon you will have powdered powder.

Ball powders by their nature will pretty much automatically stack to maximum denstiy. It is the coarse stick powders that can be improved.

This is and old problem, with and even older fix. Get a long powder drop tube or a long neck funnel and slowly pour the powder into the case. Presto you will no longer have a compressed charge. [img]/ubbthreads/images/graemlins/grin.gif[/img]